How do you say

I’m planning to spend a week in Japan with friends during the vacation.

..in Chinese?

假期里,我计划和朋友去日本玩一周。

jià qī lǐ , wǒ jì huà hé péng yǒu qù rì běn wán yī zhōu 。

How do you say "I intend to buy a new sofa in three months." in Chinese?